Method for checking data written into buffered write-read memori

Details Method for checking data written into buffered write-read memori Method for checking data written into buffered write-read memori

1980-09-22

1982-10-19

Atkinson, Charles E.

Excavating

371 53, G06F 1110

Patent

active

043553907

ABSTRACT:
A method for checking stored data in numerically controlled machine tools with buffered write-read memories is disclosed. The longitudinal sums of associated data are formed in individual write-read memories and are written into a supplementary buffer memory. When the system is switched-on or at periodic intervals, the longitudinal sums of the data are formed and compared with the stored longitudinal sums. In the event of deviations, the affected data block is indicated.

REFERENCES:
patent: 3838264 (1974-09-01), Maker
patent: 4142243 (1979-02-01), Bishop et al.
I. S. Glickstein, Weighted Checksum to Detect and Restore Altered Bits in Computer Memory, IBM Tech. Discl. Bulletin, vol. 13, No. 10, Mar. 1971, pp. 3146-3147.
R. K. Richards, Arithmetic Operations in Digital Computers, D. Van Nostrand Co., Inc., 1955, pp. 190-191.

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